LED sink with full outputs error detection
Features
■ Low voltage power supply down to 3 V
■ 8 constant current output channels
■ Adjustable output current through external
resistor
■ Short and open output error detection
■ Serial data IN/parallel data OUT
■ 3.3 V micro driver-able
■ Output current: 5-100 mA
■ 30 MHz clock frequency
■ Available in high thermal efficiency TSSOP
exposed pad
■ ESD protection 2.5 kV HBM, 200 V MM
Description
The STP08DP05 is a monolithic, low voltage, low
current power 8-bit shift register designed for LED
panel displays. The STP08DP05 contains a 8-bit
serial-in, parallel-out shift register that feeds a
8-bitD-type storage register. In the output stage,
eight regulated current sources were designed to
provide 5-100 mA constant current to drive the
LEDs.
The STP08DP05 is backward compatible in the
functionality and footprint with STP8C/L596 and
extends its functionality with open and short
detection on the outputs. The detection circuit
checks 3 different conditions that can occur on the
output line: short to GND, short to V
Table 1. Device summary
or open line.
O
STP08DP05
Low voltage 8-bit constant current
DIP-16
TSSOP16
(Exposed pad)
TSSOP16
The data detection results are loaded in the shift
register and shifted out via the serial line output.
The detection functionality is implemented without
increasing the pin number, through a secondary
function of the output enable and latch pin (DM1
and DM2 respectively), a dedicated logic
sequence allows the device to enter or leave from
detection mode. Through an external resistor,
users can adjust the STP08DP05 output current,
controlling in this way the light intensity of LEDs,
in addition, user can adjust LED’s brightness
intensity from 0% to 100% via OE/DM2
The STP08DP05 guarantees a 20 V output
driving capability, allowing users to connect more
LEDs in series. The high clock frequency,
30 MHz, also satisfies the system requirement of
high volume data transmission. The 3.3 V of
voltage supply is well useful for applications that
interface any micro from 3.3 V. Compared with a
standard TSSOP package, the TSSOP exposed
pad increases heat dissipation capability by a 2.5
factor.
SO-16
pin.
Order codes Package Packaging
STP08DP05B1R DIP-16 25 parts per tube
STP08DP05MTR SO-16 (Tape and reel) 2500 parts per reel
STP08DP05TTR TSSOP16 (Tape and reel) 2500 parts per reel
STP08DP05XTTR TSSOP16 exposed-pad (Tape and reel) 2500 parts per reel
October 2009 Doc ID 13405 Rev 4 1/30
www.st.com
30
Contents STP08DP05
Contents
1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Pin connection and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.3 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Switching characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Equivalent circuit and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Truth table and timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.1 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.2 Timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
10 Detection mode functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
10.1 Phase one: “entering in detection mode“ . . . . . . . . . . . . . . . . . . . . . . . . . 18
10.2 Phase two: “error detection“ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
10.3 Phase three: “resuming to normal mode” . . . . . . . . . . . . . . . . . . . . . . . . . 20
10.4 Error detection conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
11 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2/30 Doc ID 13405 Rev 4
STP08DP05 Summary description
1 Summary description
Table 2. Typical current accuracy
Current accuracy
Output voltage
Between bits Between ICs
≥1.3 V ±1.5% ±5% 20 to 100 mA
1.1 Pin connection and description
Figure 1. Connections diagram
Output current
Note: The exposed pad should be electrically connected to a metal land electrically
isolated or connected to ground.
Table 3. Pin description
Pin n° Symbol Name and function
1 GND Ground terminal
2 SDI Serial data input terminal
3 CLK Clock input terminal
4 LE/DM1 Latch input terminal
5-12 OUT 0-7 Output terminal
13 OE/DM2 Output enable input terminal (active low)
14 SDO Serial data out terminal
15 R-EXT Constant current programming
16 V
DD
5 V supply voltage terminal
Doc ID 13405 Rev 4 3/30
Block diagram STP08DP05
2 Block diagram
Figure 2. Normal mode - block diagram
4/30 Doc ID 13405 Rev 4
STP08DP05 Maximum rating
3 Maximum rating
Stressing the device above the rating listed in the “absolute maximum ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the operating sections of
this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
3.1 Absolute maximum ratings
Table 4. Absolute maximum ratings
Symbol Parameter Value Unit
V
I
f
T
T
V
GND
CLK
OPR
Supply voltage I
DD
Output voltage -0.5 to 20 V
O
I
Output current 100 mA
O
GND terminal current 800 mA
Clock frequency 50 MHz
Operating temperature range -40 to +125 °C
Storage temperature range -55 to +150 °C
STG
3.2 Thermal data
Table 5. Thermal data
Symbol Parameter DIP-16 SO-16 TSSOP-16
R
1. The exposed-pad should be soldered to the PBC to realize the thermal benefits
Thermal resistance junction-ambient 90 125 140 37.5 °C/W
thJA
GND
0 to 7 V
TSSOP-16
(exposed pad)
(1)
Unit
Doc ID 13405 Rev 4 5/30
Maximum rating STP08DP05
3.3 Recommended operating conditions
Table 6. Recommended operating conditions
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
I
I
V
V
t
wLAT
t
wCLK
t
wEN
t
SETUP(D)
t
HOLD(D)
t
SETUP(L)
f
CLK
Supply voltage 3.0 - 5.5 V
DD
Output voltage - 20 V
O
Output current OUTn 5 - 100 mA
I
O
Output current SERIAL-OUT - +1 mA
OH
Output current SERIAL-OUT - -1 mA
OL
Input voltage 0.7V
IH
Input voltage -0.3 - 0.3V
IL
LE/DM1 pulse width
DD
20 - ns
-VDD+0.3 V
CLK pulse width 20 - ns
OE/DM2 pulse width 200 - ns
VDD = 3.0 to 5.0V
Setup time for DATA 7 - ns
Hold time for DATA 4 - ns
Setup time for LATCH 15 - ns
Clock frequency Cascade operation
(1)
-30MHz
DD
1. If the device is connected in cascade, it may not be possible achieve the maximum data transfer. Please
consider the timings carefully.
V
6/30 Doc ID 13405 Rev 4
STP08DP05 Electrical characteristics
4 Electrical characteristics
VDD = 3.3 V to 5 V, T = 25 °C, unless otherwise specified.
Table 7. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
I
OH
V
OL
V
OH
I
OL1
OL2
I
OL3
ΔI
OL1
OL2
ΔI
OL3
R
SIN(up)
R
SIN(down)
I
DD(OFF1)
Input voltage high level 0.7 V
IH
Input voltage low level GND 0.3 V
IL
Output leakage current VOH = 20 V 0.5 10 μA
Output voltage
(Serial-OUT)
Output voltage
(Serial-OUT)
Output current
Output current error
between bit
(All Output ON)
Pull-up resistor 150 300 600 kΩ
Pull-down resistor 100 200 400 kΩ
Supply current (OFF)
I
DD(OFF2)
I
DD(ON1)
Supply current (ON)
I
DD(ON2)
Thermal Thermal protection
I
OL
I
OH
V
O
VO = 0.3 V, R
VO = 1.3 V, R
V
O
VO = 0.3 VR
VO = 1.3 VR
R
EXT
OUT 0 to 7 = OFF
R
EXT
OUT 0 to 7 = OFF
R
EXT
OUT 0 to 7 = ON
R
EXT
OUT 0 to 7 = ON
(1)
DD
V
DD
DD
= 1 mA 0.03 0.4 V
= -1 mA V
= 0.3 V, R
= 0.3 VR
= 3.9 kΩ 4.25 5 5.75
ext
= 970 Ω 19 20 21
ext
= 190 Ω 96 100 104
ext
= 3.9 kΩ ± 5 ± 8
EXT
= 970 Ω ± 1.5 ± 3
EXT
=190 Ω ± 1.2 ± 3
EXT
= 980
= 250
- VDD =- 0.4V V
OH
45
11.2 13.5
mAI
mA
= 980
= 250
4.5 5
11.7 13.5
170 °C
V
V
%ΔI
1. Guaranteed by design (not tested)
The thermal protection switches OFF only the outputs current
Doc ID 13405 Rev 4 7/30
Switching characteristics STP08DP05
5 Switching characteristics
VDD = 5 V, T = 25 °C, unless otherwise specified.
Table 8. Switching characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
t
PLH1
t
PLH2
t
PLH3
t
PLH
t
PHL1
t
PHL2
t
PHL3
t
PHL
t
ON
Propagation delay time,
CLK-OUTn, LE\DM1 = H,
OE\DM2
= L
Propagation delay time,
LE\DM1 -OUTn,
OE\DM2
= L
Propagation delay time,
OE\DM2-OUTn,
LE\DM1 = H
Propagation delay time,
CLK-SDO
Propagation delay time,
CLK-OUTn, LE\DM1 = H,
OE\DM2
= L
Propagation delay time,
LE\DM1 -OUTn,
OE\DM2
= L
Propagation delay time,
OE\DM2-OUTn,
LE\DM1 = H
Propagation delay time,
CLK-SDO
Output rise time
10~90% of voltage
waveform
V
= 3.3 V VIH = V
DD
DD
VIL = GND CL = 10pF
= 20 mA VL = 3.0 V
I
O
R
= 1 KΩ RL = 60 Ω
EXT
= 3.3 V 36 46.8
V
DD
= 5 V 19 24.7
V
DD
V
= 3.3 V 38 49.4
DD
= 5 V 21 27.3
V
DD
VDD = 3.3 V 42 54
= 5 V 23 30
V
DD
= 3.3 V 22 28.6
V
DD
= 5 V 18 23.4
V
DD
V
= 3.3 V 9 11.7
DD
= 5 V 5 6.5
V
DD
V
= 3.3 V 4 5.2
DD
= 5 V 3 3.9
V
DD
VDD = 3.3 V 6 7.8
= 5 V 3 3.9
V
DD
= 3.3 V 25 32.5
V
DD
= 5 V 20 26
V
DD
VDD = 3.3 V 30 39
= 5 V 15 19.5
V
DD
ns
ns
ns
ns
ns
ns
ns
ns
ns
Output fall time
t
90~10% of voltage
OFF
waveform
CLK rise time
t
r
CLK fall time
t
f
1. In order to achieve high cascade data transfer, please consider tr/tf timings carefully.
(1)
(1)
8/30 Doc ID 13405 Rev 4
VDD = 3.3 V 7 9.1
= 5 V 6 7.8
V
DD
5000 ns
5000 ns
ns
STP08DP05 Equivalent circuit and outputs
6 Equivalent circuit and outputs
Figure 3. OE/DM2 terminal
Figure 4. LE/DM1 terminal
Figure 5. CLK, SDI terminal
Figure 6. SDO terminal
Doc ID 13405 Rev 4 9/30
Truth table and timing diagram STP08DP05
7 Truth table and timing diagram
7.1 Truth table
Table 9. Truth table
Clock LE/DM1 OE/DM2 SDI OUT0 ........ OUT0 ........ OUT7 SDO
H L Dn Dn ..... Dn -5 ..... Dn -7 Dn -7
L L Dn + 1 No change Dn -7
H L Dn + 2 Dn +2
X L Dn + 3 Dn +2
..... Dn -3 ..... Dn -5 Dn -5
..... Dn -3 ..... Dn -5 Dn -5
X H Dn + 3 OFF Dn -5
Note: OUT0 to OUT7 = ON when Dn = H; OUT0 to OUT7 = OFF when Dn = L.
7.2 Timing diagram
Figure 7. Timing diagram - normal mode
10/30 Doc ID 13405 Rev 4
STP08DP05 Truth table and timing diagram
Figure 8. Clock, serial-in, serial-out
Figure 9. Clock, serial-in, latch, enable, outputs
Doc ID 13405 Rev 4 11/30
Truth table and timing diagram STP08DP05
Figure 10. Outputs
12/30 Doc ID 13405 Rev 4
STP08DP05 Typical characteristics
8 Typical characteristics
Figure 11. Output current-R
EXT
resistor
TA = 25 °C, Vdrop = 0.3 V; 1.2 V, Iset = 3 mA; 5 mA; 10 mA; 20 mA; 50 mA; 80 mA, Max
Table 10. Output current-R
Output current (mA) 3 5 10 20 50 80 130
Rext (Ω) 6740 3930 1913 963 386 241 124
resistor
EXT
Note: Maximum output current capabilities setting was 130 mA applying a Rext = 124
Ω
Doc ID 13405 Rev 4 13/30
Typical characteristics STP08DP05
Figure 12. I
910
810
710
610
510
410
Vdrop (mV)
310
210
110
10
0 102030405060708090100110
Table 11. I
Vdd
(V)
vs drop out voltage (V
SET
vs drop out voltage (V
SET
I set
Rext
(mA)
Iset (mA )
(Ω)
)
DROP
)
DROP
Vdrop min
(mV)
Vdrop max
(mV)
Vdd 5.0V
Vdd 3.0V
Vdrop AVG
(mV)
3 6470 30.6 31.2 30.93
5 3930 46.5 52.9 48.63
10 1910 80.9 100 82.26
3
20 963 150 161 157
50 386 392 396 394.3
80 241 636 646 640.3
100 192 846 850 848
3 6470 25.6 29 26.96
5 3930 40.8 41.7 41.16
10 1910 80.1 105 89.2
5
20 963 153 154 154
50 386 379 386 382
80 241 618 626 621
100 192 825 830 827
14/30 Doc ID 13405 Rev 4
STP08DP05 Typical characteristics
Figure 13. Power dissipation vs temperature package
Note: The exposed-pad should be soldered to the PBC to realize the thermal benefits.
Doc ID 13405 Rev 4 15/30
Test circuit STP08DP05
9 Test circuit
Figure 14. DC characteristics
Figure 15. AC characteristics
16/30 Doc ID 13405 Rev 4
STP08DP05 Test circuit
Figure 16. Timing example for open and/or short detection
Doc ID 13405 Rev 4 17/30
Detection mode functionality STP08DP05
10 Detection mode functionality
10.1 Phase one: “entering in detection mode“
From the “normal mode” condition the device can switch to the “error mode” by a logic
sequence on the OE/DM2
Table 12. Entering in detection truth table
CLK1°2°3°4°5°
and LE/DM1 pins as showed in the following table and diagram:
OE/DM2
HLHHH
LE/DM1 LLLHL
Figure 17. Entering in detection timing diagram
After these five CLK cycles the device goes into the “error detection mode” and at the 6
th
rise front of CLK the SDI data are ready for the sampling.
18/30 Doc ID 13405 Rev 4
STP08DP05 Detection mode functionality
10.2 Phase two: “error detection“
The eight data bits must be set “1” in order to set ON all the outputs during the detection.
The data are latched by LE/DM1 and after that the outputs are ready for the detection
process. When the micro controller switches the OE/DM2
LEDs in order to analyze if an OPEN or SHORT condition has occurred.
Figure 18. Detection diagram
to LOW, the device drives the
The LEDs status will be detected at least in 1 microsecond and after this time the
microcontroller sets OE\DM2
in HIGH state and the output data detection result will go to
the microprocessor via SDO.
Detection mode and normal mode use both the same format data. As soon as all the
detection data bits are available on the serial line, the device may go back to normal mode
of operation. To re-detect the status the device must go back in normal mode and reentering in error detection mode.
Doc ID 13405 Rev 4 19/30
Detection mode functionality STP08DP05
10.3 Phase three: “resuming to normal mode”
The sequence for re-entering in normal mode is showed in the following table and diagram:
Table 13. Resuming to normal mode timing diagram
CLK1°2°3°4°5°
OE/DM2
HLHHH
LE/DM1 LLLLL
Figure 19. Resuming to normal mode timing diagram
Note: For proper device operation the “entering in detection” sequence must be follow by a
“resume mode” sequence, isn’t possible to insert consecutive equal sequence.
20/30 Doc ID 13405 Rev 4
STP08DP05 Detection mode functionality
10.4 Error detection conditions
VDD = 3.3 to 5 V temperature range 25 °C.
Table 14. Detection condition
SW-1 or SW-3b
Open line or output
short to GND
detected
==> I
ODEC
≤ 0.5 x I
No error
O
detected
==> I
ODEC
≥ 0.5 x I
O
SW-2 or SW-3a
Short on LED or short
to V-LED detected
==> VO ≥ 2.5V
Note: Where: IO = the output current programmed by the R
I
= the detected output current in detection mode.
ODEC
Figure 20. Detection circuit
EXT
,
No error
detected
==> VO ≤ 2.2 V
16
Doc ID 13405 Rev 4 21/30
Package mechanical data STP08DP05
11 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
22/30 Doc ID 13405 Rev 4
STP08DP05 Package mechanical data
Plastic DIP-16 (0.25) MECHANICAL DATA
DIM.
mm. inch
MIN. TYP MAX. MIN. TYP. MAX.
a1 0.51 0.020
B 0.77 1.65 0.030 0.065
b 0.5 0.020
b1 0.25 0.010
D 20 0.787
E 8.5 0.335
e 2.54 0.100
e3 17.78 0.700
F 7.1 0.280
I 5.1 0.201
L 3.3 0.130
Z 1.27 0.050
P001C
Doc ID 13405 Rev 4 23/30
Package mechanical data STP08DP05
TSSOP16 MECHANICAL DATA
mm. inch
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
A 1.2 0.047
A1 0.05 0.15 0.002 0.004 0.006
A2 0.8 1 1.05 0.031 0.039 0.041
b 0.19 0.30 0.007 0.012
c 0.09 0.20 0.004 0.0079
D 4.9 5 5.1 0.193 0.197 0.201
E 6.2 6.4 6.6 0.244 0.252 0.260
E1 4.3 4.4 4.48 0.169 0.173 0.176
e 0.65 BSC 0.0256 BSC
K0˚ 8˚0˚ 8˚
L 0.45 0.60 0.75 0.018 0.024 0.030
A2
A
A1
b
e
c
K
L
E
D
E1
PIN 1 IDENTIFICATION
1
24/30 Doc ID 13405 Rev 4
0080338D
STP08DP05 Package mechanical data
TSSOP16 EXPOSED PAD MECHANICAL DATA
mm. inch
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
A 1.2 0.047
A1 0.15 0.004 0.006
A2 0.8 11.050.0310.039 0.041
b 0.19 0.30 0.007 0.012
c 0.09 0.20 0.004 0.0089
D 4.9 5 5.1 0.193 0.197 0.201
D1 2.7
3.0
3.3
E 6.2 6.4 6.6 0.244 0.252 0.260
E1 4.3 4.4 4.5 0.169 0.173 0.177
E2 2.
7
3.0
3.3
e 0.65 0.0256
K0° 8°0° 8°
L 0.45 0.60 0.75 0.018 0.024 0.030
7419276A
Doc ID 13405 Rev 4 25/30
Package mechanical data STP08DP05
Tape & Reel TSSOP16 MECHANICAL DATA
DIM.
mm. inch
MIN. TYP MAX. MIN. TYP. MAX.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 22.4 0.882
Ao 6.7 6.9 0.264 0.272
Bo 5.3 5.5 0.209 0.217
Ko 1.6 1.8 0.063 0.071
Po 3.9 4.1 0.153 0.161
P 7.9 8.1 0.311 0.319
26/30 Doc ID 13405 Rev 4
STP08DP05 Package mechanical data
SO-16 MECHANICAL DATA
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
mm. inch
A 1.75 0.068
a1 0.1 0.25 0.004 0.010
a2 1.64 0.063
b 0.35 0.46 0.013 0.018
b1 0.19 0.25 0.007 0.010
C 0.5 0.019
c1 45° (typ.)
D 9.8 10 0.385 0.393
E 5.8 6.2 0.228 0.244
e 1.27 0.050
e3 8.89 0.350
F 3.8 4.0 0.149 0.157
G 4.6 5.3 0.181 0.208
L 0.5 1.27 0.019 0.050
M 0.62 0.024
S8° (max.)
0016020D
Doc ID 13405 Rev 4 27/30
Package mechanical data STP08DP05
Tape & Reel SO-16 MECHANICAL DATA
DIM.
mm. inch
MIN. TYP MAX. MIN. TYP. MAX.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 22.4 0.882
Ao 6.45 6.65 0.254 0.262
Bo 10.3 10.5 0.406 0.414
Ko 2.1 2.3 0.082 0.090
Po 3.9 4.1 0.153 0.161
P 7.9 8.1 0.311 0.319
28/30 Doc ID 13405 Rev 4
STP08DP05 Revision history
12 Revision history
Table 15. Document revision history
Date Revision Changes
3-Apr-2007 1 First release
21-May-2007 2 Updated Table 7 on page 7
Updated Section 8: Typical characteristics on page 13 added
08-Aug-2008 3
22-Oct-2009 4 Updated Note: on page 3
Figure 12 and Figure 11 on page 14 updated Figure 13 on
page 15
Doc ID 13405 Rev 4 29/30
STP08DP05
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30/30 Doc ID 13405 Rev 4
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